I've modified regular t shanks to work in my Bladeless, using a rotary tool to clear one nub, thin the blade shank (as it needs to be no more than 1.15mm thick) and, using a diamond burr, drill a hole for the lock tab. The ones on top of the exchangers are regular u-shanks, the ones in and under are modified t shanks (with the exception of the serrated and plain edge blades which are homemade): [ You are not allowed to view this attachment ]
Let me know if help is needed.